Update:
Kindly go through updated steps to reproduce issue:
1.Launch chrome ,open NTP and Navigate to www.tatapowersed.in.
2.In New NTP Enable 'Enable network service' flag from chrome://flags and relaunch the chrome.
3.Again navigate to above URl.
4.Flash permission bubble appears click on 'Allow' button and observe.


Just to add some information:

Did this work with Enable network service flag disable?
Yes

Deleted: Expected_Result.mp4 1.5 MB

	Expected_Result.mp4 1.5 MB View Download

Please find the stack trace for the crash id:
---------------------------------------------
Thread 3 (id: 0xcd4) CRASHED [EXCEPTION_ACCESS_VIOLATION_READ @ 0x00000000 ] MAGIC SIGNATURE THREAD
Stack Quality100%Show frame trust levels
0x00007fff8f465f5d	(chrome.dll -pepper_tcp_socket_message_filter.cc:640 )	content::PepperTCPSocketMessageFilter::DoConnect(ppapi::host::ReplyMessageContext const &,std::basic_string<char,std::char_traits<char>,std::allocator<char> > const &,unsigned short,content::ResourceContext *)
0x00007fff8f467378	(chrome.dll -bind_internal.h:649 )	base::internal::Invoker<base::internal::BindState<void (content::PepperTCPSocketMessageFilter::*)(const ppapi::host::ReplyMessageContext &, const std::basic_string<char,std::char_traits<char>,std::allocator<char> > &, unsigned short, content::ResourceContext *),scoped_refptr<content::PepperTCPSocketMessageFilter>,ppapi::host::ReplyMessageContext,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,unsigned short,content::ResourceContext *>,void ()>::RunOnce
0x00007fff8e60fdbb	(chrome.dll -task_annotator.cc:101 )	base::debug::TaskAnnotator::RunTask(char const *,base::PendingTask *)
0x00007fff8e60f89b	(chrome.dll -message_loop.cc:319 )	base::MessageLoop::RunTask(base::PendingTask *)
0x00007fff8e60f337	(chrome.dll -message_loop.cc:373 )	base::MessageLoop::DoWork()
0x00007fff8e653a79	(chrome.dll -message_pump_win.cc:478 )	base::MessagePumpForIO::DoRunLoop()
0x00007fff8e653907	(chrome.dll -message_pump_win.cc:56 )	base::MessagePumpWin::Run(base::MessagePump::Delegate *)
0x00007fff8e60ee90	(chrome.dll -run_loop.cc:102 )	base::RunLoop::Run()
0x00007fff8e653877	(chrome.dll -browser_process_sub_thread.cc:178 )	content::BrowserProcessSubThread::IOThreadRun(base::RunLoop *)
0x00007fff8e60d83f	(chrome.dll -thread.cc:337 )	base::Thread::ThreadMain()
0x00007fff8f714c23	(chrome.dll -platform_thread_win.cc:91 )	base::`anonymous namespace'::ThreadFunc
0x00007fffc5391fe3	(KERNEL32.dll + 0x00011fe3 )	BaseThreadInitThunk
0x00007fffc6efcb30	(ntdll.dll + 0x0006cb30 )	RtlUserThreadStart

As this being a Non-Regression issue, changing the status to Untriaged so that the issue would get addressed.

Thank You!

Update :
Rechecked the above issue on Windows 10 OS with latest Canary Chrome version : 69.0.3493.0 and the issue is Fixed.Kindly refer the attached screen cast for reference.

Deleted: Fixed_video.mp4 1.3 MB

	Fixed_video.mp4 1.3 MB View Download